<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="button.css">
    <style>
      /*#red {color:red; background:yellow;}*/
      /*#green {color:green; background:yellow;}*/
      #red {color:red;}
      #green {color:green; }

    </style>
  </head>
  <body style="width: 300px;">
    <div id="user_info"></div>
    <script src="popup.js"></script>
  </body>
</html>
